[B O (OH) ] 8H O D Borax SiO . Duralumin is an alloy of a) Cu,Mn b) Cu,Al,Mg c) Al,Mn d) Al,Cu,Mn,Mg . The compound that is used in nuclear reactors as protective shields and control rods is a) Metal borides b) metal oxides c) Metal carbonates d) metal carbide . The stability of + oxidation state increases in the sequence a) Al < Ga < In < Tl b) Tl < In < Ga < Al c) In < Tl < Ga < Al d) Ga< In < Al < Tl Answer the following questions: .
Write a short note on anamolous properties of the first element of p-block. . Describe briefly allotropism in p- block elements with specific reference to carbon. .
Give the uses of Borax. . What is catenation ? describe briefly the catenation property of carbon.
. Write a note on Fisher tropsch synthesis. B C D (a) (b) (c) (d) None of these - - - - . Give the structure of CO and CO .
. Give the uses of silicones. . Describe the structure of diborane.
. Write a short note on hydroboration. . Give one example for each of the following (i) icosagens (ii) tetragens (iii) pnictogens (iv) chalcogens .
Write a note on metallic nature of p-block elements. . Complete the following reactions b c B OH +NH Na B O + H SO H O B H + 2NaOH 2H O B H + CH OH BF + H O HCOOH + H SO d e f SiCl + NH SiCl + C H OH B + NaOH g h i j . H B O Red hot → .
How will you identify borate radical? . Write a note on zeolites. .
How will you convert boric acid to boron nitride? . A hydride of nd period alkali metal (A) on reaction with compound of Boron (B) to give a reducing agent (C). identify A, B and C.